multcompView-package {multcompView} | R Documentation |
Convert a logical vector or a vector of p-values or a difference or distance matrix into a display identifying the pairs for which the differences were not significantly different or for which the difference exceeded a threshold.
Package: | multcompView |
Type: | Package |
Version: | 0.1-0 |
Date: | 2006-08-06 |
License: | GPL |
Convert a logical vector or a vector of p-values or a difference or distance matrix into either a letter-based display using "multcompLetters" or a graphic roughly like a "T" using "multcompTs" to identify factor levels or similar groupings that are or are not significantly different. Designed for use in conjunction with the output of functions like TukeyHSD, dist{stats}, simint, simtest, csimint, csimtest{multcomp}, friedmanmc, kruskalmc{pgirmess}.
Spencer Graves and Hans-Peter Piepho with help from Sundar Dorai-Raj
Maintainer: Spencer Graves <spencer.graves@pdf.com>
Piepho, Hans-Peter (2004) "An Algorithm for a Letter-Based Representation of All-Pairwise Comparisons", Journal of Computational and Graphical Statistics, 13(2)456-466.
John R. Donaghue (2004) "Implementing Shaffer's multiple comparison procedure for a large number of groups", pp. 1-23 in Benjamini, Bretz and Sarkar (eds) Recent Developments in Multiple Comparison Procedures (Institute of Mathematical Statistics Lecture Notes-Monograph Series vol. 47)
dif3 <- c(FALSE, FALSE, TRUE) names(dif3) <- c("a-b", "a-c", "b-c") multcompTs(dif3) multcompLetters(dif3) library(MASS) multcompBoxplot(Postwt~Treat, data=anorexia)